---
title: A slide is faster on a smooth mat or in smooth shorts than in rough… — Friction: the grip that stops and helps · tree and pragmatics
description: A slide is faster on a smooth mat or in smooth shorts than in rough jeans, because smooth material rubs less; bare, sweaty legs grip a metal slide, squeak and slow you down. Who acts: slide, smooth material, bare sweaty legs. A sentence of the lesson «Friction: the grip that stops and helps» of the 
---

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# Friction: the grip that stops and helps, sentence 15

<!-- .ven lang=en -->
A slide is faster on a smooth mat or in smooth shorts than in rough jeans, because smooth material rubs less; bare, sweaty legs grip a metal slide, squeak and slow you down.

<!-- .vintro -->
**Who acts:** slide, smooth material, bare sweaty legs · **What happens:** be, rub, grip, squeak, slow down · **To what, where:** smooth mat, metal slide, you

<!-- .vabout -->
This is a sentence of the lesson «Friction: the grip that stops and helps» of the physics course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (slide, smooth material, bare sweaty legs), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:006-friction-the-grip.lesson:15
# text = A slide is faster on a smooth mat or in smooth shorts than in rough jeans, because smooth material rubs less; bare, sweaty legs grip a metal slide, squeak and slow you down.
# source = school lesson (ours)
# course = physics
# lesson = 006-friction-the-grip.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R1-cc-next ×2, R8-pos-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	slide	slide	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	faster	fast	ADJ	JJR	Degree=Cmp	0	root	_	_
5	on	on	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	smooth	smooth	ADJ	JJ	Degree=Pos	8	amod	_	_
8	mat	mat	NOUN	NN	Number=Sing	4	obl	_	_
9	or	or	CCONJ	CC	_	12	cc	_	Agree=R1-cc-next|Haiku=8:cc
10	in	in	ADP	IN	_	12	case	_	_
11	smooth	smooth	ADJ	JJ	Degree=Pos	12	amod	_	_
12	shorts	short	NOUN	NNS	Number=Plur	8	conj	_	_
13	than	than	ADP	IN	_	16	case	_	_
14	in	in	ADP	IN	_	16	case	_	_
15	rough	rough	ADJ	JJ	Degree=Pos	16	amod	_	_
16	jeans	jeans	NOUN	NNS	Number=Ptan	4	obl	_	_
17	,	,	PUNCT	,	_	21	punct	_	_
18	because	because	SCONJ	IN	ExtPos=ADP	21	mark	_	_
19	smooth	smooth	ADJ	JJ	Degree=Pos	20	amod	_	_
20	material	material	NOUN	NN	Number=Sing	21	nsubj	_	_
21	rubs	rub	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	advcl	_	_
22	less	less	ADV	RBR	Degree=Cmp	21	advmod	_	_
23	;	;	PUNCT	,	_	28	punct	_	_
24	bare	bare	ADJ	JJ	Degree=Pos	27	amod	_	_
25	,	,	PUNCT	,	_	24	punct	_	_
26	sweaty	sweaty	ADJ	JJ	Degree=Pos	27	amod	_	_
27	legs	leg	NOUN	NNS	Number=Plur	28	nsubj	_	_
28	grip	grip	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	16	conj	_	_
29	a	a	DET	DT	Definite=Ind|PronType=Art	31	det	_	_
30	metal	metal	NOUN	NN	Number=Sing	31	compound	_	_
31	slide	slide	NOUN	NN	Number=Sing	28	obj	_	_
32	,	,	PUNCT	,	_	33	punct	_	_
33	squeak	squeak	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	28	conj	_	Agree=R8-pos-agree|Haiku=28:conj|HaikuPos=VERB:VB:VerbForm=Inf
34	and	and	CCONJ	CC	_	35	cc	_	Agree=R1-cc-next|Haiku=33:cc
35	slow	slow	VERB	VB	VerbForm=Inf	33	conj	_	_
36	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	35	obj	_	_
37	down	down	ADP	RP	_	35	compound:prt	_	_
38	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | a slide |  |  | a smooth mat or smooth shorts |  | than rough jeans; fast *property* | tree rules |
| 2 | **rub** | present | smooth material |  |  |  |  | less *property* | vn spray-9.7-1 «NP V PP.destination»: agent=Theme |
| 3 | **grip** | present | bare sweaty legs | a metal slide |  |  |  |  | vn touch-20-1 «NP V NP»: agent=Agent slide=Experiencer |
| 4 | **squeak** | present | bare sweaty legs *not said here* |  |  |  |  |  | vn animal\_sounds-38 «NP V»: agent=Agent |
| 5 | **slow down** | infinitive | bare sweaty legs *not said here* | you |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent you=Patient |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:physics:006-friction-the-grip.lesson:15`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R1-cc-next ×2, R8-pos-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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